Exchange-coupled α-Fe/Fe3O4 bi-magnetic nanoparticles with non-core/shell morphology formed by eutectoid decomposition of FeO nanoparticles
Exchange-coupled α-Fe/Fe3O4 bi-magnetic nanoparticles with non-core/shell morphology formed by eutectoid decomposition of FeO nanoparticles
复制标题
Fe3O纳米颗粒共析分解形成的具有非核/壳形态的交换耦合α-Fe/Fe3O4双磁性纳米颗粒
DOI：
10.1016/j.matlet.2021.129468
复制
发表时间：
2021
影响因子：
3
通讯作者：
Toshiro Tanaka
中科院分区：
文献类型：
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作者：
Saeki Yamamuro;Toshiro Tanaka
提出了一种制备非核/壳型铁氧体双磁性纳米粒子的新方法，该方法是由共析反应诱导的基于薄片的相分离过程产生的。制备工艺是基于化学合成的FeO纳米颗粒的共析分解成由铁磁性金属（α-Fe）和铁磁性尖晶石铁氧体（Fe3O4）组成的纳米级混合物。在673 K的惰性气氛中退火1h后，FeO的分解几乎完全完成。室温磁化测量结果表明，尽管两磁相共存，但仍产生了具有单相行为的光滑曲线，这表明两磁相可能是磁交换耦合的。由于组成金属离子的取代可以调节尖晶石铁氧体的磁性，因此本文所述的制备工艺有望为制造各种铁基合金/铁氧体双磁性纳米颗粒提供一条潜在的途径。
A new approach to fabricating ferrite-based bi-magnetic nanoparticles with non-core/shell morphology, generated by a lamella-based phase separation process induced by the eutectoid reaction, is presented. The fabrication process is based on the eutectoid decomposition of chemically synthesized FeO nanoparticles into a nanoscale mixture consisting of a ferromagnetic metal (α-Fe) and a ferrimagnetic spinel ferrite (Fe3O4). It was found that decomposition of FeO was almost fully completed after annealed at 673 K for 1 h in an inert atmosphere. The room-temperature magnetization measurements gave rise to smooth curves with single-phase-like behavior despite the coexistence of two magnetic phases, suggesting that the two magnetic phases could be magnetically exchange-coupled. Since the substitution of constituent metal ions can tune the magnetic properties of the spinel ferrites, the fabrication process described here is expected to provide a potential route to making various kinds of iron-based alloy/ferrite bi-magnetic nanoparticles.
影响因子：
8.6
作者：
Kodama, RH;Makhlouf, SA;Berkowitz, AE
通讯作者：
Berkowitz, AE
影响因子：
3.2
作者：
Peng, DL;Hihara, T;Morikawa, H
通讯作者：
Morikawa, H
影响因子：
4.7
作者：
通讯作者：
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